Unit 12 Life is full of the unexpected Section A (Grammar Focus-4c) 预习导学（无答案）

Unit 12 Life is full of the unexpected. (Period 3)
Section A (Grammar Focus-4c)
班级_________ 姓名_________
学完这一课，你能够掌握：
1．语法：过去完成时；
2．能力：使用过去完成时和时间状语从句描述过去的事件；
3．交际功能：使用句型“When I got to school, I realized that I had left my backpack at home.”“By the time I got back to school, the bell had rung.”“As I was waiting in line with the other office workers, I heard a loud sound.”描述过去的事件。
【学习任务一】
词汇检测
1．n. 奶油；乳脂 __________
2．n. 工作日 __________
3．赶到；露面 ____________________
4．n. 豆；豆荚 __________
5．n. 市场；集市 __________
6．在（某时间点）以前 ____________________
【学习任务二】
阅读教材第92页，根据汉语提示写出英文句子。
1．当我到达学校时，我意识到我把背包忘在家里了。
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2．我回到学校的时候，铃已经响了。
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3．我还没来得及到公交车站，公交车就已经开走了。
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4．玛丽起床时，蒂姆已经去了浴室。
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【学习任务一】
1．用括号内所给单词的正确形式填空。
（1）When I got there, the bus ________ (go).
（2）By the time I got to class, the teacher __________ (start) teaching.
（3）I ________ (clean) the room before he arrived.
（4）Most of the guests ________ (leave) by the time he arrived at the party.
2．观察 Grammar Focus 中的句子，写下你的发现及疑问：
When I got to school, I realized that I had left my backpack at home.
By the time I got back to school, the bell had rung.
Before I got to the bus stop, the bus had already left.
I was about to go up to my office when I decided to get a coffee first.
As I was waiting in line with the other office workers, I heard a loud sound.
Notes:
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【学习任务二】
按要求完成下面的句子。
1．Jenny had already cleaned the room when I called her. （改为否定句）
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2．He had left before she could say a word. （改为一般疑问句）
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3．By the time I arrived, Tom had finished the work. （对画线部分提问）
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4．She went to Shanghai. I arrived there. （用 by the time 连成一句）
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【学习任务三】
Make sentences using by the time or before.
1．Tim went into the bathroom. Mary got up.
By the time Mary got up, Tim had already gone into the bathroom.
2．The coffee became cold. I put cream in the coffee.
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3．The teacher collected the math homework. I got to school.
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4．I completed the work for my boss. The workday ended.
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5．The movie started. I arrived at the cinema.
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6．My mother finished making the apple pie.
I got home from my language course.
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【学习任务四】
1．写出下列单词的过去式和过去分词。
原形 过去式 过去分词
rush
forget
arrive
go
show
find
2．Fill in the blanks with the correct forms of the words in the box.
rush out forget arrive at go into show up find out
（1）By the time I arrived at the party, everyone else ______ already _________.
（2）When he put the noodles into a bowl, he realized he ____________ to add the green beans.
（3）By the time my mother came back from the market, I ______ already __________ of the door to go to my piano lesson.
（4）Before she got to the airport, she ___________ about the earthquake.
（5）When she ___________ the movie theater, she remembered she had forgotten to feed her dog.
（6）Before she got a chance to say goodbye, he ____________ the building.
【学习任务五】
Write two true statements and one false statement about your day yesterday. Then ask your classmates to guess the false statement.
1．By the time I left for school in the morning, ____________________________________
2．By the end of the school day, _______________________________________________
3．By dinner time, I _________________________________________________________
【学习任务六】
小组探究
1．show up意为“________________”，为不及物短语动词，后面______（能/不能）接宾语。
2．阅读并总结句中画线部分的用法。
·By the end of last month, I had planted several thousand trees.
·He will come by the end of the month.
·You will find the hospital at the end of the road.
·He came back at the end of March.
·He succeeded in the end.
（1）by the end of 意为“__________________________”，仅指时间，指某一动作在某时间点以前或到某一时间段为止就已发生或完成，多用于_______________________时态中。
（2）at the end of 意为“_______________________”，后面可接________或________，通常与_______________________时态连用。
（3）in the end 意为“__________________________”，相当于 __________________。
请根据本课所学内容，列出关键词或画出你的思维导图吧！
根据自己的实际情况，运用过去完成时和 when、by the time、before 造句。（不少于三句话）
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